1. Chapter 10, Lesson 4 Water Vapor and Humidity water vapor humidity relative humidity transpiration cloud formation thermal convection meteorologist

2. water vapor - water in its gas form is water vapor. If you can see it, it’s not really water vapor!

3. humidity – the level of moisture in the air; the amount of water vapor in the air

4. relative humidity – is when you compare how much water vapor is in the air to how much it COULD hold

5. transpiration –watery vapor passed through a membrane or pores in a plant

6. transpiration –watery vapor passed through a membrane or pores in a plant

7. cloud formation – the way clouds form

8. cloud formation – the way clouds form

9. cloud formation – the way clouds form

10. cloud formation – the way clouds form

11. thermal – a rising air current caused by heating the Earth’s surface (radiation)

12. thermal – heated air that rises thermals help these birds to soar, they help gliders soar, too. They push air into the atmosphere, that cools and forms clouds

13. convection – when relatively warm air is raised into the atmosphere, often cooling and forming clouds

14. meteorologist – a scientist who deals with the atmosphere, including weather and climate